1,0.5,0.25,0.125...这列数中第八个数是几?

0.5+0.25+0.125+.+0.0078125 化简(1+2^0.125)(1+2^0.25)(1+2^0.5). 用简便方法计算 1/32/0.5/0.25/0.125等于 简算1÷64÷0.5÷0.25÷0.125 1,0.5,0.25,0.125...这列数中第八个数是几? 0.125×0.25×0.5×0.4 简算 0.125*0.25*0.5*64 简算 0.125*0.25*0.5*64过程 96*0.125*0.25*0.5巧算 (0.5+0.25+0.125）/(0.5*0.25*0.125)*7/18*9/2+1/6/131/3-15/4*16/5 (0.5x+1)+(0.25x+0.5)+(0.125x+2.25)=x怎么解, 数列0.25,0.5,2,（ ）,2,0.5是什么数列?A.1 B.4 C.0.25 D.0.125 64乘0.125乘0.5乘0.25 0.5×0.25×0.125×64简便方法 128*(0.5+0.25+0.125)的简算巧算方法? 0.125.0.25.0.375.0.5是什么规律 0.125 0.25 0.375 0.5.第十个数是什么 0.5+0.25+0.125+0.0625+0.03125怎样速算